KR100985518B1 - Metal plate formed micro hole and pattern and mafacturing method thereof - Google Patents

Abstract

PURPOSE: A metal plate, in which a fine hole and a pattern are formed, and a manufacturing method thereof are provided to reduce the frequency of buffing machine and brush process by removing burr in a pattern forming process. CONSTITUTION: A metal plate comprises a fine hole(222) and a plurality of pattern grooves(244). The fine hole is formed in one side of the metal plate. The fine hole is formed through entire metal plate. The patterns consisting of a plurality of pattern grooves is formed on one side of the metal plate. The pattern groove is positioned close to the fine hole.

Description

Metal plate with fine holes and pattern and its manufacturing method {METAL PLATE FORMED MICRO HOLE AND PATTERN AND MAFACTURING METHOD THEREOF}

The present invention relates to a metal plate formed with fine holes and patterns, and a method for manufacturing the same. Since the micro holes are difficult to identify with the naked eye due to the patterns formed on one surface of the metal plate, the metal plates with fine holes and patterns formed therein can enhance aesthetics and their It relates to a manufacturing method.

Recently, electronics cases such as mobile phones, notebooks or PDAs (Personal Digital Assistants) have tended to change their materials from plastics such as plastics to metals. In the case of a metal, the gloss of the metal itself is not only different from conventional plastics, but also because it is possible to obtain a large strength even in a small volume, it is preferred because it has the advantage of reducing the weight of the product. In recent years, by forming micro holes in a metal case and irradiating light from the rear, a design in which a letter, a figure, or a picture can be expressed with light in a background of a metal plate has gained popularity.

Hereinafter, a conventional metal plate on which fine holes are formed will be described with reference to FIGS. 1 to 3.

1 is a perspective view of a conventional metal plate 100 having a fine hole 120, FIG. 2 is a cross-sectional view showing a state in which a transparent coating layer 160 is formed on one surface of the metal plate 100 of FIG. It is sectional drawing which shows the state in which the burr 140 was formed in the periphery of the microhole 120 formed in the metal plate 100 of 1. For reference, the word “KOOKY” is formed in the metal plate 100 of FIG. 1 by the plurality of micro holes 120.

Referring to FIG. 1, since the micro holes 120 are visually observed in the conventional metal plate 100 in which the micro holes 120 are formed, when the light is irradiated from the rear of the metal plate 100, a dramatic effect may be achieved. There are no drawbacks. That is, the conventional metal plate 100 is a dramatic effect is reduced because only the user is more clear by light in the state in which the user recognizes the word "KOOKY" in FIG.

Referring to FIG. 2, in the process of forming the microholes 120 in the conventional metal plate 100, burrs 140 are formed around the majority of the microholes 120. Since the burr 140 roughens the surface of the metal plate 100 and adversely affects the appearance, it should be removed later by a separate process.

The present invention is derived to solve the problems of the prior art as described above, because it is difficult to visually observe the micro holes due to the pattern formed on one surface of the metal plate, which can enhance the aesthetics, the metal plate with a fine hole and pattern is formed and To provide a method.

In addition, the present invention is to provide a metal plate with a fine hole and a pattern, and a method of manufacturing the same, which can simplify the manufacturing process because the burr can be removed in the process of forming the pattern.

The metal plate on which the microholes and the pattern are formed according to an aspect of the present invention has one surface and the other surface. In the metal plate, micro holes are formed from one surface to the other surface, and the micro holes are reduced in size from one surface to the other surface. In addition, a pattern consisting of a plurality of pattern grooves is formed on the other surface of the metal plate, and the plurality of pattern grooves overlap each other to form a straight line or a curve.

Embodiments according to the present invention may have one or more of the following features. For example, the minimum diameter of the micro holes may be 0.25 mm or less, and the thickness of the metal plate may be 1 mm or less. In addition, one surface of the metal plate may have a partition wall including micro holes therein.

The waveguide sheet may be provided inside the partition wall. In addition, the interval between the straight line or curve formed by the pattern groove and the adjacent straight line or curve may be 0.08 ~ 0.1mm.

In the method of manufacturing a metal plate with a fine hole and a pattern according to an aspect of the present invention, the step of repeatedly scanning the laser to one surface of the metal plate to form a fine hole-the fine hole is reduced in size from one surface of the metal plate to the other surface- And forming a pattern by scanning a laser on the other surface of the metal plate to form a pattern, and simultaneously removing burrs formed around the micro holes, wherein the pattern grooves are formed larger than the micro holes.

The present invention can provide a metal plate with a fine hole and a pattern, and a method of manufacturing the same, which can enhance aesthetics because it is difficult to visually observe the fine holes due to the pattern formed on one surface of the metal plate.

In addition, the present invention can provide a metal plate with a fine hole and a pattern, and a method for manufacturing the same, which can simplify the manufacturing process because the burr can be removed in the process of forming the pattern.

1 is a perspective view of a conventional metal plate in which fine holes can be visually observed.
2 is a cross-sectional view of the metal plate showing a state where burrs are formed around the micro holes.
3 is a perspective view of one surface of a metal plate according to an embodiment of the present invention, showing a state in which a plurality of fine holes are formed.
Figure 4 is a perspective view of the other surface of the metal plate according to an embodiment of the present invention, showing a state in which a pattern is formed.
5 is a plan view illustrating a state in which a plurality of pattern grooves are formed to overlap each other on one surface of a metal plate according to one embodiment of the present invention.
6 is a cross-sectional view taken along line AA ′ of FIG. 5.
7 is a cross-sectional view of a metal plate according to an embodiment of the present invention, showing a state in which fine holes and patterns are formed.
8 is a perspective view of the other surface of the metal plate according to an embodiment of the present invention, showing a state in which a pattern is formed.
9 is a flowchart illustrating a method of manufacturing a metal plate with a fine hole and a pattern according to an embodiment of the present invention.
10 is a perspective view of a metal plate according to another embodiment of the present invention.
FIG. 11 is a cross-sectional view of the metal plate along the BB ′ line of FIG. 10.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in describing the present invention with reference to the accompanying drawings, the same or corresponding elements are denoted by the same reference numerals regardless of the reference numerals, and duplicates thereof. The description will be omitted.

3 is a perspective view illustrating one surface 220 of a metal plate 200 according to an embodiment of the present invention. 3 shows that the plurality of micro holes 222 processed by the laser form a shape in which the English word “KOOKY” is inverted. 4 is a perspective view illustrating a state in which a pattern 242 is formed on the other surface 240 of the metal plate 200, and FIG. 5 shows a plurality of pattern grooves 244 overlapping each other on one surface 220 of the metal plate 200. It is a top view which shows the state formed. 6 is a cross-sectional view taken along line AA ′ of FIG. 5, and FIG. 7 is a cross-sectional view of the metal plate 200 according to the exemplary embodiment of the present invention, in which the micro holes 222 and the pattern grooves 244 are formed. Indicates. 8 is a perspective view showing a state in which a circular pattern 240 is formed on the metal plate 200.

3 to 8, the metal plate 200 is a thin plate having a thickness of about 1 mm, and has a flat surface 220 and the other surface 240 formed flat. The metal plate 200 may be formed of various materials such as aluminum, magnesium, stainless steel, and titanium. When the material of the metal plate 200 is aluminum having a large degree of reaction with air, a thin oxide film may be formed on the surface of the metal plate 200. Such an oxide film serves to protect the surface of the metal plate 200 with a gloss effect.

Fine holes 222 are formed on one surface 220 of the metal plate 200. The fine holes 222 are formed to have a minimum diameter of 0.25 mm or less, and may be formed by a laser or the like. When the fine holes 222 are formed by the laser, the diameter decreases toward the other surface 240 of the metal plate 200 as compared to the diameter of the one surface 220 to which the laser is irradiated. Accordingly, as can be seen in FIG. 6, the shape of the microhole 222 generally has the shape of a circular truncated cone, and the minimum diameter refers to the diameter at the other surface 240 of the metal plate 200.

The plurality of micro holes 222 illustrated in FIG. 3 form a shape in which the English word “KOOKY” is flipped left and right. Therefore, the other surface 240 of the metal plate 200 may be expressed as "KOOKY". Of course, a pattern 242 is formed on the other surface 240 of the metal plate 200, and the micro holes 222 are hardly observed by the naked eye due to the pattern 242.

The rear of the metal plate 200 according to the present embodiment may be provided with a lighting device (not shown) such as an LED (LED). The light emitted from the lighting device may go out of the metal plate 200 through the micro holes 222, thereby allowing the user to observe the word "KOOKY" with the naked eye and to check the presence of the micro holes 222. You will know. Therefore, the micro holes 222 formed in the metal plate 200 according to the present embodiment may be visible to the user only when necessary.

The micro holes 222, for example, by using a laser having a wavelength of 1064nm to form a hole of 0.03 ~ 0.05mm diameter using a 100mm F-Theta lens in the scanner-type marking head, several times such a process It can be formed by a repeating method. The diameter of the fine holes 222 formed by this method is about 0.03 mm. And the area for processing the fine hole 222 can be automatically controlled using the X, Y stage of the laser processing device (not shown).

Burrs may be formed in the process of forming the micro holes 222 using a laser. The burr is later removed in the process of forming the pattern 242 on the other surface 240 of the metal plate 200, and the burr not removed in the process of forming the pattern 242 is removed by a separate removal process.

The pattern 242 is formed on the other surface 240 of the metal plate 200. In the pattern 242 illustrated in FIG. 4, lozenges having the same size and shape are arranged at regular intervals. The rhombic pattern 242 is formed by the pattern groove 244.

The pattern groove 244 may be formed by scanning a laser in the same manner as the processing method of the microhole 222. Unlike the fine hole 222, the pattern groove 244 is not formed through the metal plate 200, but corresponds to a groove having a predetermined depth. Therefore, the light shining from the rear of the metal plate 200 does not pass through the pattern groove 244.

As illustrated in FIGS. 5 to 6, the pattern groove 244 is formed by overlapping a plurality of minute grooves using a laser. The overlapping pattern groove 244 is to form various patterns 242 such as the lozenge by forming a straight line or curve. As shown in FIG. 5, in a straight line formed by the pattern groove 244 and a straight line adjacent thereto, a distance between the centers of the straight lines may be 0.08 to 0.1 mm.

In the process of forming the pattern 242 using a laser, burrs generated in the process of forming the micro holes 222 may be removed. As shown in FIG. 7, the pattern groove 244 may coincide with the formation position of the micro holes 222, and burrs may be removed in the process of forming the pattern grooves 244 formed at the same position as the micro holes 222. have. In order to form the pattern grooves 244, burrs formed around the microholes 222 may be removed in the process of irradiating a laser, thereby facilitating a process of removing burrs later.

If the position of the fine hole 222 is not the same as the position of the pattern groove 244, the burr is removed later by a separate process. At this time, since the burrs are partially removed in the process of forming the pattern grooves 244, the remaining burs can be easily removed. Burs may be removed by a deburring device such as a buffing machine or a brush, or may be removed by chemical methods such as etching. Since the burrs are partially removed in the process of forming the pattern groove 244, the number of processes of the buffing machine or the brush can be reduced.

As shown in FIG. 7, the size of the pattern groove 244 may be smaller than that of the micro holes 222. However, when the size of the micro holes 222 is very small, the pattern grooves 244 may be fine holes ( Of course, it may be formed larger than 222). And the cross section of the pattern groove 244 has a substantially "U" or "V" shape, the surface of such a pattern groove 244 serves to recognize the pattern groove 244 first by diffusely reflecting the external light. . Therefore, since the pattern groove 244 is first visually recognized, the fine holes 222 are hardly observed by the naked eye.

The shape of the pattern 242 formed by the pattern groove 244 may be anything as long as it does not visually recognize the fine holes 222. For example, as illustrated in FIG. 4, the pattern 242 may have a rhombic shape, and may have a circular shape as illustrated in FIG. 8. In addition, although not shown in the drawings, the pattern may be formed by a fine straight line or a figure such as a square, an arrow shape, various pictures or fonts.

Hereinafter, a method of processing a metal plate on which fine holes and patterns are formed according to an embodiment of the present invention will be described with reference to FIG. 9.

9 is a flowchart illustrating a method of processing a metal plate on which fine holes and patterns are formed according to an embodiment of the present invention.

Referring to FIG. 9, the metal plate processing method in which the microholes and the pattern are formed according to an embodiment of the present invention includes the steps of repeatedly scanning the laser onto one surface 220 of the metal plate 200 to process the microholes, and the metal plate ( Scanning a laser on the other surface of the 200 to form a pattern 242 consisting of a plurality of mutually overlapping pattern grooves 244, and removing the burr remaining around the fine hole 222.

First, in order to form the micro holes 222, the laser is repeatedly scanned on one surface 220 of the metal plate 200 to form the micro holes 222 having a diameter of 0.25 mm or less. The cross-sectional shape of the microholes 222 has the shape of a truncated cone as shown in FIG. 7 because the microholes 222 are formed while deeply focusing the laser beam on one surface 220 of the metal plate 200. .

Of course, if the processing method of the micro holes 222 is different, the shape of the micro holes 220 is of course changed.

After the formation of the micro holes 222, the pattern 242 is completed by forming a plurality of pattern grooves 244 by irradiating a laser on the other surface 240 of the metal plate 200. The pattern groove 244 may also be formed using a laser, and may not be formed through the metal plate 200. As described above, a plurality of minute pattern grooves 244 are formed to overlap each other to form a straight line or a curve. The pattern 242 is formed by such a straight line or a curve.

Some burrs may be removed in the process of forming the pattern groove 244, but some burrs may remain. Therefore, the burr can be removed as much as possible by forming the pattern groove 244 with a small gap.

In the present exemplary embodiment, the micro holes 222 are formed on one surface 220 of the metal plate 200, and then the pattern 242 is formed on the other surface 240, but the micro holes 222 and the pattern 242 are formed. Of course, the order of formation can be changed.

After forming the micro holes 222 and the pattern 242 in the metal plate 200, the burrs are removed using a burr removing device. In the burr removal process, burrs formed around the micro holes 222 may be removed, as well as burrs that may occur in the process of forming the pattern groove 244.

Hereinafter, referring to FIGS. 10 to 11, the metal plate on which the microholes and the pattern are formed according to another exemplary embodiment will be described.

10 is a perspective view of a metal plate on which fine holes and patterns are formed according to another embodiment of the present invention, and FIG. 11 is a cross-sectional view of the metal plate along line BB ′ of FIG. 10.

10 to 11, the metal plate 300 according to the present embodiment has the same structure as the metal plate 200 according to the above-described embodiment, except that the partition wall 360 is formed on one surface of the metal plate 300. The difference is that there is. Hereinafter, the metal plate 300 according to the present embodiment will be described based on differences in construction.

A rectangular partition wall 360 is formed on one surface 320 of the metal plate 300. The partition wall 360 is formed to have a constant height and surrounds a word formed by the microhole 322. Referring to FIG. 10, two partitions 360 are shown, and one partition 360 surrounds the word “SKY” and the other partition 360 surrounds the word “Telecom”. As such, the partition wall 360 surrounds a word formed by the microhole 322 and serves to separate one word from another word.

As can be seen in FIG. 11, lighting devices 382 and 384 may be provided in the partition wall 360, respectively. The lighting device 380 such as an LED may be received inside the partition 360 to irradiate light toward a word corresponding to each partition 360. For example, when the lighting device 382 located on the left side is activated, the light from the lighting device 382 passes through the micro holes 322, which causes the "SKY" on the other surface 340 of the metal plate 300. You will see the word "." When the lighting device 384 located on the right side is operated, light emitted from the lighting device 384 passes through the micro holes 322, so that the word “Telecom” may be seen on the other surface 340 of the metal plate 300. Will be.

In order to uniformly transmit the light from the lighting device 382 to the plurality of microholes 322, a waveguide sheet such as a white film (not shown) is formed inside the partition wall 360. Not added). In addition, by implementing a variety of colors in the waveguide sheet it is possible to produce a variety of colors using a monochromatic light source.

Each of these lighting devices 382 and 384 can be controlled independently of each other, so that the order of the words seen by the user can be determined. For example, when the lighting device 382 on the left side and the lighting device 384 on the right side do not operate, only the word “SKY” is visible through the other surface 340 of the metal plate 300. This is because light emitted from the lighting device 382 on the left side is blocked by the partition wall 360 and thus does not reach the microhole 322 forming the word "Telecom".

Subsequently, when the lighting device 382 on the left is turned off and the lighting device 384 on the right is operated, only the word “Telecom” is visible through the other surface 340 of the metal plate 300. Of course, when both the left and right lighting devices 382 and 384 are operating, the words "SKY" and "Telecom" may both be seen.

Therefore, the metal plate 300 according to the present exemplary embodiment has an advantage of allowing each word to be seen individually because the partition wall 360 surrounds a word formed by the microhole 322.

In addition, the pattern 342 formed by the pattern groove 344 is formed on the other surface 340 of the metal plate 300 according to the present embodiment. The pattern 342 may be a pattern exemplified through FIGS. 4 and 8, and in addition to the micro holes 322, the pattern 342 may be any one that may be visually recognized before the micro holes 322. to be. Thus, in the state where only the pattern 342 is recognized on the other surface 340 of the metal plate 300, the lighting devices 382 and 384 operate so that the words "SKY" and / or "Telecom" may suddenly be recognized. The effect can be enhanced.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

200, 300: metal plate 220, 320: one side
222, 322: fine holes 240, 240: other surface
242, 342: pattern 244, 344: pattern groove
360: bulkhead 382, 384: lighting device

Claims (6)

In the metal plate having one side and the other side to form a case of an electronic product,
Fine holes are formed in the metal plate from the one surface to the other surface,
The micro holes are reduced in size from the one surface to the other surface,
The other surface of the metal plate is formed with a pattern consisting of a plurality of pattern grooves,
The pattern groove is formed adjacent to the micro holes,
A plurality of the pattern grooves are successively overlapping each other to form a fine hole and a patterned metal plate to form the pattern in a straight or curved form.
The method of claim 1,
The minimum diameter of the fine holes is 0.25mm or less, the metal plate is a metal plate and the fine hole and pattern is formed, characterized in that the thickness of 1mm or less.
The method of claim 1,
One side of the metal plate is a metal plate with a fine hole and pattern is formed, characterized in that the partition wall including the fine hole therein is formed.
The method of claim 3,
A metal plate with a fine hole and a pattern, characterized in that the waveguide sheet is provided inside the partition wall.
The method of claim 1,
The metal plate with the fine holes and patterns, characterized in that the interval between the straight line or curve formed by the pattern groove and the adjacent straight line or curve is 0.08 ~ 0.1mm.
In the metal plate manufacturing method for forming a case of an electronic product,
Repeatedly scanning the laser on one surface of the metal plate to form micro holes, wherein the micro holes are reduced in size from one surface of the metal plate to another surface; And
Forming a pattern by scanning a laser on the other surface of the metal plate to form a plurality of pattern grooves which are continuously overlapped with each other in a straight line or a curve, and simultaneously removing burrs formed around the micro holes. The method of manufacturing a metal plate with a fine hole and a pattern comprising a larger hole than the fine hole adjacent to the.

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